The AT42QT1040 is based on Atmel's patented QTouch(TM) charge-transfer sensing method. This robust technology uses spread-spectrum modulation to achieve high immunity to electrical noise. Atmel's patented Adjacent Key Suppression(TM) (AKS(TM)), technology, essential for tight-pitched keys, is used to ensure that only the intended key is activated by the touch of a finger. Long-term reliability is achieved because the device automatically calibrates on power-up and always stays calibrated even if there is a build-up of moisture or other contaminants on the touch surface or if the overall system is subject to aging. Individual key sensitivity can be configured to support a range of front panel thicknesses and materials including glass or plastic up to several millimeters thick. Electrodes can be made from copper, silver, carbon, indium tin oxide (ITO) or any other conductive material. Widely different electrode sizes and shapes are possible, giving the product designer great flexibility to tailor the user interface. The device has two power modes: a low power mode, which is ideal for small, battery-driven devices and a fast response mode, which provides minimum response time for applications where low touch latency is essential. To aid product development the AT42QT1040 has a debug mode in which internal data from the chip can be accessed. The ability to monitor the behavior of the device in this way means that designs can quickly be evaluated and tuned resulting in a shorter product design time frame.
Availability and Pricing
The AT42QT1040 is available now in a space-saving 3mm x 3mm x 0.85mm package. The device is priced at $0.35 in quantities of 100,000 units. An evaluation kit, EVK1040A, is also available, priced at $25.
Atmel is a worldwide leader in the design and manufacture of microcontrollers, advanced logic, mixed-signal, nonvolatile memory and radio frequency (RF) components. Leveraging one of the industry's broadest intellectual property (IP) technology portfolios, Atmel is able to provide the electronics industry with complete system solutions focused on consumer, industrial, security, communications, computing and automotive markets.
(C) 2009 Atmel Corporation. All Rights Reserved. Atmel(R), Atmel logo and combinations thereof, AVR(R), QTouch(TM), Adjacent Key Suppression(TM), AKS(TM) and others, are registered trademarks, or trademarks of Atmel Corporation or its subsidiaries. Other terms and product names may be trademarks of others.
For further details about this and other Atmel touch sense products, please visit www.atmel.com/products/touch
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